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Silole-Infiltrated Photonic Crystal Films as Effective Fluorescence Sensor for Fe3+ and Hg2+

Authors

  • Prof. Yuqi Zhang,

    1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566
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  • Xiangdong Li,

    1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566
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  • Prof. Loujun Gao,

    1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566
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  • Jianhua Qiu,

    1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566
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  • Prof. Liping Heng,

    Corresponding author
    1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566
    2. School of Chemistry and Environment, Beihang University, 100191 (China)
    3. Key Laboratory of Organic Solids, Center for Molecular Science, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190 (China)
    • College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi, 716000 (China), Fax: (+86) 10-8262 7566

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  • Prof. Ben Zhong Tang,

    1. Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong (China)
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  • Prof. Lei Jiang

    1. School of Chemistry and Environment, Beihang University, 100191 (China)
    2. Key Laboratory of Organic Solids, Center for Molecular Science, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190 (China)
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Abstract

We develop a highly effective silole-infiltrated photonic crystal (PC) film fluorescence sensor with high sensitivity, good selectivity and excellent reproducibility for Fe3+ and Hg2+ ions. Hexaphenylsilole (HPS) infiltrated PCs show amplified fluorescence due to the slow photon effect of PC because the emission wavelength of HPS is at the blue band edge of the selected PC’s stopband. The fluorescence can be quenched significantly by Fe3+/Hg2+ ions owing to electron transfer between HPS and metal ions. The amplified fluorescence enhances the sensitivity of detection, with a detection limit of 5 nM for Fe3+/Hg2+ ions. The sensor is negligibly responsive to other metal ions and can easily be reproduced by rinsing with pure water due to the special surface wettability of PC. As a result, a highly effective Fe3+/Hg2+ ions sensor based on HPS-infiltrated PC film has been achieved, which will be important for effective and practical detection of heavy metal ions.

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